Photoelectric EffectHard

Question

A B C
t = 0    N0        0          0
t    N1        N2          N3
The ratio of N1 to N2 when N2 is maximum is : 

Options

A.at no time this is possible
B.2
C.1/2
D.

Solution

= λN1 − 2λN2
for N2 to be maximum,
= 0    ⇒    λN1 = 2λN2   or  = 2

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